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Use expressions for odd integers to confirm the conjecture that the product for two odd integers is an odd integer.
2n + 1 et 2n + 3 are two odd integers with n integer (2n+1)(2n+3) = 4n² + 8n + 3 =2(4n² + 4n) + 3 2(4n² + 4n) is an even integer so 2(4n² + 4n) + 3 is an odd number because the sum of an even number and an odd number is an odd number.
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